Seoul Subway Line 2

Seoul Subway Line 2 (Korean: 서울 지하철 2호선), also known as the Circle Line, is a circular line of the Seoul Metropolitan Subway. The line running clockwise is called the "inner circle line" and the counter-clockwise line is called the "outer circle line". This is Seoul's most heavily used line, and consists of the main loop (48.8 km (30.3 mi)), the Seongsu Branch (5.4 km (3.4 mi)) and the Sinjeong Branch (6.0 km (3.7 mi)) for a total line length of 60.2 km (37.4 mi). The Line 2 loop is the third longest subway loop in the world after Moscow Metro Bolshaya Koltsevaya line and Beijing Subway Line 10. In 2019, Line 2 had an annual ridership of 812 million passengers or 2.2 million passengers per day.

Line 2
Overview
Native name2호선(二號線)
I Hoseon
StatusOperational
Termini
  • City Hall / Seongsu / Sindorim
  • City Hall / Sinseol-dong / Kkachisan
Stations51
Service
TypeRapid transit
SystemSeoul Metropolitan Subway
Operator(s)Seoul Metro
History
OpenedOctober 31, 1980 (1980-10-31)
Technical
Line length60.2 km (37.4 mi)
Number of tracks2
Electrification1,500 V DC overhead catenary
Operating speed90 km/h (56 mph)
Route map

Legend
Sinjeong branch
Kkachisan–Sindorim
234-4
Kkachisan
link with Line 5
234-3
Sinjeongnegeori
234-2
Yangcheon-gu Office
Sinjeong Depot
234-1
Dorimcheon
Daerim
233
234
Sindorim
Guro Digital Complex
232
235
Mullae
Sindaebang
231
236
Yeongdeungpo-gu Office
Sillim
230
237
Dangsan
Bongcheon
229
Dangsan Railway Bridge
across Han River
Seoul National University
228
Yeouido Island
Nakseongdae
227
238
Hapjeong
Sadang
226
239
Hongik University
Bangbae
225
240
Sinchon
Seocho
224
241
Ewha Womans University
Seoul National
University of Education
223
242
Ahyeon
Gangnam
222
243
Chungjeongno
Yeoksam
221
201
City Hall
Seolleung
220
202
Euljiro 1-ga
Samseong
219
203
Euljiro 3-ga
Sports Complex
218
204
Euljiro 4-ga
Jamsilsaenae
217
205
Dongdaemun History
& Culture Park
Jamsil
216
206
Sindang
Jamsillaru
215
207
Sangwangsimni
Jamsil Railway Bridge
across Han River
208
Wangsimni
Gangbyeon
214
209
Hanyang University
Guui
213
210
Ttukseom
Konkuk University
212
211
Seongsu
Seongsu branch
Seongsu–Sinseol-dong
211-1
Yongdap
Sindap Depot
211-2
Sindap
211-3
Yongdu
211-4
Sinseol-dong
link with Line 1

Headways on the line vary from 2 minutes 18 seconds on peak periods and 5–6 minutes off-peak periods. The line connects the city centre to Gangnam, Teheran Valley and the COEX/KWTC complex.

History

In 1972, then-Mayor of Seoul Koo Ja-choon (ko) (1932–1996) changed the existing plans for the Seoul Subway to better enable connectivity around the growing Seoul City and allow for development to take place across the Seoul Metropolitan Area. Line 2 was built in 1978–84 together with the Seongsu Branch (the second Sinjeong Branch was built 1989–95). Dangsan Railway Bridge was closed for reconstruction in 1996 and reopened November 22, 1999. The old steel girder bridge was replaced by a 1.3-kilometre (0.81 mi) long concrete bridge between Dangsan on the southern side of the river and Hapjeong on the northern bank. During this period, the inner loop only ran to Dangsan Station, and the outer loop only ran to either Hongik University Station or Hapjeong Station.

Yongdu station on the Seongsu Branch (between Sindap and Sinseol stations) is the first station in the Seoul Subway system with operating platform screen doors. As of 2008 platform screen doors are operating at all stations along Line 2. New rolling stock has also progressively came on line, replacing older vehicles.

● October 31, 1980 Sinseol-dong – Sports Complex (via Seongsu) section opened
● December 23, 1982 Sports Complex – Seoul Nat'l Univ. of Education section opened
● September 16, 1983 Euljiro 1-ga – Seongsu section opened; Sinseol-dong – Seongsu section separated as Seongsu Branch
● December 17, 1983 Seoul Nat'l Univ. of Education – Seoul Nat'l University section opened
● May 22, 1984 Seoul Nat'l University – Euljiro 1-ga (via Sindorim) section opened; the Circle Line (the longest in the world at 54.2 km (33.7 mi) until it was surpassed in 2013) is completed.
● May 22, 1992 Sindorim – Yangcheon-gu Office section opened as Sinjeong Branch
● February 29, 1996 Sinjeongnegeori Station opened as extension of Sinjeong Branch
● March 20, 1996 Kkachisan Station opened as extension of Sinjeong Branch
● October 20, 2005 Yongdu Station opened on the Seongsu Branch
● September 2010 Siemens Mobility ATP/ATO GoA 2 signalling system implemented on newer trains to increase frequencies and route capacity.

Facilities

In December 2010 the line is recorded as having the highest WiFi data consumption in the Seoul Metropolitan area. It averaged 2.56 times more than the other 14 subway lines fitted with WiFi service zones.

In 2011, retailer Homeplus opened the world's first virtual supermarket at Seolleung station, where smartphone users can photograph the bar code of life-size pictures of 500 items of food, toiletries, electronics etc. on the walls and platform screen doors, for delivery the same day.

Stations

All stations on all branches are in Seoul.

Main Line

Station
number
Station name Connections Distance Location
English Hangul Hanja in km Total
201
City Hall 시청 市廳
---
0.0
Jung-gu
202
Euljiro 1(il)-ga
(Hana Bank)
을지로입구
(하나은행)
乙支路入口
(하나銀行)
0.7
0.7
203
Euljiro 3(sam)-ga
(Shinhan Card)
을지로3가
(신한카드)
乙支路三街
(新韓카드)
0.8
1.5
204
Euljiro 4(sa)-ga
(BC Card)
을지로4가
(BC카드)
乙支路四街
(BC카드)
0.6
2.1
205
Dongdaemun History & Culture Park
(DDP)
동대문역사문화공원
(DDP)
東大門歷史文化公園
(DDP)
1.0
3.1
206
Sindang 신당 新堂
0.9
4.0
207
Sangwangsimni 상왕십리 上往十里
0.9
4.9
Seongdong-gu
208
Wangsimni
(Seongdong-gu Office)
왕십리
(성동구청)
往十里
(城東區廳)
0.8
5.7
209
Hanyang Univ. 한양대 漢陽大
1.0
6.7
210
Ttukseom 뚝섬 뚝섬
1.1
7.8
211
Seongsu 성수 聖水 (Seongsu branch)
0.8
8.6
212
Konkuk Univ. 건대입구 建大入口
1.2
9.8
Gwangjin-gu
213
Guui
(Gwangjin-gu Office)
구의
(광진구청)
九宜
(廣津區廳)
1.6
11.4
214
Gangbyeon
(Dongseoul Bus Terminal)
강변
(동서울터미널)
江邊
(東서울터미널)
0.9
12.3
215
Jamsillaru
(Suhyup Insurance)
잠실나루
(수협중앙회공제보험)
蠶室나루
(水協中央會控除保險)
1.8
14.1
Songpa-gu
216
Jamsil
(Songpa-gu Office)
잠실
(송파구청)
蠶室
(松坡區廳)
1.0
15.1
217
Jamsilsaenae 잠실새내 蠶室새내
1.2
16.3
218
Sports Complex 종합운동장 綜合運動場
1.2
17.5
219
Samseong
(World Trade Center Seoul)
삼성
(무역센터)
三成
(貿易센터)
1.0
18.5
Gangnam-gu
220
Seolleung
(Acuon Savings Bank)
선릉
(애큐온저축은행)
宣陵
(애큐온貯蓄銀行)
1.3
19.8
221
Yeoksam
(Centerfield)
역삼
(센터필드)
驛三
(센터필드)
1.2
21.0
222
Gangnam 강남 江南
0.8
21.8
223
Seoul National University of Education
(Court & Prosecutors' Office)
교대
(법원·검찰청)
敎大
(法院·檢察廳)
1.2
23.0
Seocho-gu
224
Seocho 서초 瑞草
0.7
23.7
225
Bangbae
(Baekseok Arts Univ.)
방배
(백석예술대)
方背
(白石藝術大)
1.7
25.4
226
Sadang 사당 舍堂
1.6
27.0
Dongjak-gu
227
Nakseongdae
(Ganggamchan)
낙성대
(강감찬)
落星垈
(姜邯贊)
1.7
28.7
Gwanak-gu
228
Seoul National University
(Gwanak-gu Office)
서울대입구
(관악구청)
서울大入口
(冠岳區廳)
1.0
29.7
229
Bongcheon 봉천 奉天
1.0
30.7
230
Sillim
(Yangji Hospital)
신림
(양지병원)
新林
(陽地病院)
1.1
31.8
231
Sindaebang 신대방 新大方
1.8
33.6
Dongjak-gu
232
Guro Digital Complex
(Wonkwang Digital Univ.)
구로디지털단지
(원광디지털대)
九老디지털團地
(圓光디지털大)
1.1
34.7
Guro-gu
233
Daerim
(Guro-gu Office)
대림
(구로구청)
大林
(九老區廳)
1.1
35.8
234
Sindorim 신도림 新道林 (Sinjeong branch)
1.8
37.6
235
Mullae
(Kim's Eye Hospital)
문래
(김안과병원)
文來
(金眼科病院)
1.2
38.8
Yeongdeungpo-gu
236
Yeongdeungpo-gu Office 영등포구청 永登浦區廳
0.9
39.7
237
Dangsan 당산 堂山
1.1
40.8
238
Hapjeong
(Holt Children's Services, Inc)
합정
(홀트아동복지회)
合井
(홀트兒童福祉會)
2.0
42.8
Mapo-gu
239
Hongik Univ.
(Eduwill Academy)
홍대입구
(에듀윌학원)
弘大入口
(에듀윌學院)
1.1
43.9
240
Sinchon 신촌
(지하)
新村
1.3
45.2
241
Ewha Womans Univ. 이대 梨大
0.8
46.0
242
Ahyeon 아현 阿峴
0.9
46.9
243
Chungjeongno
(Kyonggi Univ.)
충정로
(경기대입구)
忠正路
(京畿大入口)
0.8
47.7
Seodaemun-gu

Seongsu Branch

Station
number
Station name Connections Distance Location
English Hangul Hanja in km Total
211
Seongsu 성수 聖水 (Main Line)
---
0.0
Seongdong-gu
211-1
Yongdap 용답 龍踏
2.3
2.3
211-2
Sindap 신답 新踏
1.0
3.3
211-3
Yongdu
(Dongdaemun-gu Office)
용두
(동대문구청)
龍頭
(東大門區廳)
0.9
4.2
Dongdaemun-gu
211-4
Sinseol-dong 신설동 新設洞
1.2
5.4

Sinjeong Branch

Station
number
Station name Connections Distance Location
English Hangul Hanja in km Total
234
Sindorim 신도림 新道林 (Main Line)
---
0.0
Guro-gu
234-1
Dorimcheon 도림천 道林川
1.0
1.0
234-2
Yangcheon-gu Office 양천구청 陽川區廳
1.7
2.7
Yangcheon-gu
234-3
Sinjeongnegeori 신정네거리 新亭네거리
1.9
4.6
234-4
Kkachisan 까치산 까치山
1.4
6.0
Gangseo-gu

Extension

There is a possible extension currently in the conception stage to extend the Sinjeong Branch to 3.7 km to Gayang Station on Line 9. The path would include a new station named Gangseo-gu Office in between Kkachisan and Gayang.

Rolling stock

Five generations of Seoul Metro 2000 series trains have been used on Seoul Subway Line 2. As of December 2025, only third, fourth and fifth batch 2000 series trains are in operation (manufactured by Hyundai Rotem and Dawonsys respectively), since all first (MELCO thyristor chopper control) and second batch (GEC Traction/Alstom thyristor chopper control) trains have been retired between 2008 and 2023. All trains are stored and maintained at Sindap Depot on the Seongsu Branch and Sinjeong Depot on the Sinjeong Branch.

See also

  • 2014 Seoul subway crash
  • Subways in South Korea
  • Seoul Metropolitan Subway

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